Cylinder Heads
- Thread starter Sixer
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RustyRatRod
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Take them in and see what a light milling will do. I think they will clean up. If not completely, then enough that a composition gasket will seal them.
RustyRatRod
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So how did this turn out?
fatecaptured
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I spoke to the machine shop a couple weeks ago. Guess I forgot about this thread. Well they said the guy did a top notch surfacing job before the damage was done, they said its utterly retarded how the guy shipped these heads. Not only what happened but the valve gear had no protection. They said a valve could get bent that way. Which reminds me. A couple of the valve seals weren't all the way down, so i poked a flat head in between the spring and pushed them down. Probably not the best idea i've had.
Anyways. As far as the damage goes, they said i could just lightly file the ridge down with a flat file. They said they could jet wash the heads, but if they aren't going to be installed right away to wait till that time. Water could get down in the pockets and start to rust. They also said i could have them machined, but they didn't think it was necessary, the deepest gouge is by a bolt hole, not a water jacket (relief) and that both gouges are outside the fire ring they said, so the gaskets should seal fine as long as i use a permitex. Also they said they've seen a few cases like this, and they doubt that ups will cover the damage do to the poor packaging of the shipper and being that there was no insurance on them.
So i just let it go. Idk im tired of dealing with ****,lol. Plus i had school registration for my daughter and some other stuff to contend with.
Anyways. As far as the damage goes, they said i could just lightly file the ridge down with a flat file. They said they could jet wash the heads, but if they aren't going to be installed right away to wait till that time. Water could get down in the pockets and start to rust. They also said i could have them machined, but they didn't think it was necessary, the deepest gouge is by a bolt hole, not a water jacket (relief) and that both gouges are outside the fire ring they said, so the gaskets should seal fine as long as i use a permitex. Also they said they've seen a few cases like this, and they doubt that ups will cover the damage do to the poor packaging of the shipper and being that there was no insurance on them.
So i just let it go. Idk im tired of dealing with ****,lol. Plus i had school registration for my daughter and some other stuff to contend with.
RustyRatRod
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Cool, I really didn't think it was gonna be a problem. Oh yeah.....keep permatex AWAY from head gaskets.
fatecaptured
Well-Known Member
i wasn't talking about a sealer, i meant a regular composite, idk if a steel gasket would seal, sorry was at work and didn't get much sleep when i typed that this morning. lol
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On an open chambered head stock head it takes about .0042" cut to reduce the chamber 1cc. There are several calculators on the net to find out what kind of a difference it will make in compression ratio but you have to plug in all the numbers like deck height of the piston, gasket thickness, chamber cc's, stroke, valve reliefs etc to get the number. Stock open chamber heads run right around 90cc so if .010 has been milled, they should check out around 87.5-88cc but I've seen chambers vary as much as 3cc on the same head from the factory! As for the intake not fitting right....core shift plays a big part in that at times so do a mock up. I've seen intakes not fit right with just a light cut and have cut heads .100" and the intake ports actually fit better even though the bolt holes had to be elongated a bit. When it comes to sand castings, there's no such thing as a perfect tolerance and the ports in the intake and heads were not machined to be exactly located....
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